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Baltimore & Ohio class B “Thatcher Perkins”
In 1862 and 1863, the Baltimore & Ohio built eleven ten-wheelers for the increased demand in the Civil War which they designated class B. The first one, numbered 117, had 64 1/2 inch drivers and a combustion chamber t...
| Baltimore & Ohio class B “Thatcher Perkins”Remove | |
|---|---|
| Variant | Standard |
| Built | 1863 |
| Manufacturers | Baltimore |
| Wheel arrangement | 2C |
| Gauge | 1435 mm |
| Length | |
| Service mass | 41141 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Baltimore & Ohio class B “Thatcher Perkins” Standard Remove |
|---|---|
| Built | 1863 |
| Manufacturers | Baltimore |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Baltimore & Ohio class B “Thatcher Perkins” Standard Remove |
|---|---|
| Wheelbase | 6.49 m |
| Service mass | 41.1 t |
| Adhesion mass | 31 t |
| Total mass | 69.7 t |
| Rigid wheelbase | 3.38 m |
| Axle load | 10.3 t |
| Water capacity | 11,356 l |
| Fuel capacity | 3.6 t (coal) |
Boiler
| Property | Baltimore & Ohio class B “Thatcher Perkins” Standard Remove |
|---|---|
| Grate area | 1.801 m² |
| Firebox surface | 10.557 m² |
| Tube heating surface | 93.495 m² |
| Evaporative heating surface | 104.052 m² |
| Total heating surface | 104.1 m² |
Power plant
| Property | Baltimore & Ohio class B “Thatcher Perkins” Standard Remove |
|---|---|
| Driver diameter | 1,473 mm |
| Boiler pressure | 5.2 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | Baltimore & Ohio class B “Thatcher Perkins” Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 186 kW (253 PS) |
| Starting effort | 45.9 kN |
Calculated values
| Property | Baltimore & Ohio class B “Thatcher Perkins” Standard Remove |
|---|---|
| Factor of adhesion | 1 : 6.62 |
| Optimal speed | 24 km/h |
| Power-to-weight ratio | 4.5 kW/t |
| Heating Surface Equivalent | 156.8 m² |
| Cylinder volume/HSE | 1 : 1,540.47 |
| Adhesive weight/Total | 1 : 1.33 |
| Tractive force/Heating surface | 1 : 9.21 |
| Grate area/Heating surface | 1 : 57.77 |
| Firebox/Tube surface | 1 : 8.86 |
